From: Intubation success in prehospital emergency anaesthesia: a retrospective observational analysis of the Inter-Changeable Operator Model (ICOM)
Number of attempts required to pass an endotracheal tube
Success/n
Success/n (cumulative)
Cumulative success/% (95% CI)
One
604
89.6% (87.1–91.7)
Two
61
665
98.7% (97.5–98.7)
Three
7
672
99.7% (98.9–100.0)
Four
2
674
100.0% (99.4–100.0)